Method for using sludge floccules decomposed by alkaline substances to promote slurry forming of sludge and coal-water slurry

An alkaline substance, sludge water technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. The effect of improving quality and reducing environmental pollution

Inactive Publication Date: 2017-09-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the existing technical problems, the present invention provides a method of using alkaline substances to crack sludge flocs to promote the slurrying of sludge coal-water slurry, the purpose of which is to overcome the problem of poor slurrying properties of sludge coal-water slurry in the prior art

Method used

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  • Method for using sludge floccules decomposed by alkaline substances to promote slurry forming of sludge and coal-water slurry
  • Method for using sludge floccules decomposed by alkaline substances to promote slurry forming of sludge and coal-water slurry
  • Method for using sludge floccules decomposed by alkaline substances to promote slurry forming of sludge and coal-water slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] The sludge is taken from the mechanically dewatered sludge produced by a sewage treatment plant, with a moisture content of 80.76%, which is used for alkaline hydrolysis modification and subsequent sludge coal-water slurry production.

[0030] CaO powder is selected as the alkaline substance, and its dosage is respectively 0 (that is, original sludge), 1%, 2%, 3% and 4% of the sludge mass (converted according to the moisture content of 80%), and it is fully stirred for 20 minutes to ensure that the CaO powder Mix well with the sludge, and store the well-stirred sludge in a sealed plastic bottle to avoid loss of moisture. Alkaline hydrolysis time was 0 day (ie original sludge), 1 day and 3 days.

[0031] When making coal-water slurry from alkaline hydrolysis sludge, the mass ratio relationship of each raw material component is: sludge: dry coal powder = 15:100, additive: dry coal powder = 0.8:100 converted according to the moisture content of 80%. The additive is sodium...

Embodiment 2

[0039] (1) Implementation method

[0040] The sludge is taken from the mechanically dewatered sludge produced by a sewage treatment plant, with a moisture content of 82.42%, which is used for alkaline hydrolysis modification and subsequent sludge coal-water slurry production.

[0041] Alkaline substances choose NaOH and Ca(OH) 2, its dosage is 2% and 4% of the sludge mass (converted by 80% water content), fully stirred for 20 minutes, to ensure that the alkaline substance is mixed evenly with the sludge, and the uniformly stirred sludge is stored in a sealed plastic bottle. So as not to lose water, after 1 day (ie 24h) of treatment, alkali hydrolysis sludge was obtained. .

[0042] When making coal-water slurry from alkaline hydrolysis sludge, the mass ratio relationship of each raw material component is: sludge: dry coal powder = 15:100, additive: dry coal powder = 0.8:100 converted according to the moisture content of 80%. The additive is lignosulfonate. The solid mass c...

Embodiment 3

[0046] (1) Implementation method

[0047] The sludge is taken from the mechanically dewatered sludge produced by a sewage treatment plant, with a moisture content of 82.42%, which is used for alkaline hydrolysis modification and subsequent sludge coal-water slurry production.

[0048] Alkaline substances choose NaOH and Ca(OH) 2 , the dosage is 2% of the sludge mass (converted according to the moisture content of 80%), fully stirred for 20 minutes to ensure that the alkaline substance and the sludge are evenly mixed, and the evenly stirred sludge is stored in a sealed plastic bottle to avoid loss of moisture , After 1 day of treatment (ie 24h), the alkali hydrolysis sludge was obtained.

[0049] The coal-water slurry adopts the finished product prepared in advance, and the additive is naphthalenesulfonate formaldehyde condensate when making the coal-water slurry, and the mass ratio relationship between the additive and the dry coal powder is 0.8:100.

[0050] The alkali hydr...

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Abstract

The invention discloses a method for using alkaline substances to crack sludge flocs to promote sludge coal-water slurry slurrying. , to obtain alkali hydrolysis sludge; (2) crushing, grinding, and screening the raw coal in sequence to obtain coal powder with a particle size of less than 150 μm; (3) fully dissolving the pulping additive in water to obtain an additive solution, and then the step Add the alkaline hydrolyzed sludge in (1) and the pulverized coal in step (2) to the additive solution, and fully stir through the pulping stirring device to obtain a uniform sludge coal-water slurry; or the alkaline hydrolyzed sewage in step (1) The mud is directly mixed into the finished coal-water slurry, and a uniform sludge-coal-water slurry is obtained through sufficient stirring. Compared with the prior art, the present invention has low cost, convenient operation, and can effectively reduce the sludge-coal-water slurry into slurry Viscosity, increase slurry concentration, and obtain sludge coal-water slurry with good slurry performance, which is suitable for large-scale promotion and application.

Description

technical field [0001] The invention relates to a method of using alkaline substances to decompose sludge flocs to promote the formation of sludge coal-water slurry, specifically involves firstly using alkaline substances to decompose and modify the sludge, weaken the connection between sludge particles, and release Part of the interstitial water, and then mix the sludge after alkali hydrolysis with coal, pulping additives, water, etc. to prepare sludge coal-water slurry, or mix the cracked sludge into finished coal-water slurry, and stir evenly to make sludge Coal water slurry is a technical method that uses alkaline substances to degrade sludge flocs and their extracellular polymers to promote the formation of sludge coal water slurry. Background technique [0002] With the continuous development of my country's social economy and urbanization, the generation of urban sewage continues to increase. In recent years, my country's sewage treatment industry has developed rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C02F11/00
CPCC10L1/326C02F11/00
Inventor 王睿坤赵争辉刘志坚尹倩倩
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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